Is there such a set of model classes maintained by somebody without the overhead of an SDK. I do not need a library that includes a client and custom methods for getting friends, etc. or that store credentials. I am perfectly happy with Jersey. All I need is model classes.

Any pointers? It is OK if there is an SDK that has a clean set of model classes that I could use without having to do anything with the rest of the SDK (pun unintended).

While this link may answer the question, it is better to include the essential parts of the answer here and provide the link for reference. Link-only answers can become invalid if the linked page changes.
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cryptic ツSep 8 '13 at 21:46

@kleopatra This is hardly the sort of answer that needs to be discouraged because it is a link. The question itself asks for a set of classes, which cannot be provided in the content of an SO answer, and therefore the answer can only be a link. The link is exactly to such a set of classes. Let's not throw the baby away with the bathwater. It kills the enthusiasm of a good answer and the hard work that went behind it. It is reasonable to ask somebody to include a synopsis, but when the answer is such a good fit, the least you could do is also add a kind word about the good answer.
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necromancerSep 8 '13 at 22:10

@iRousso, ordinarily I would research your classes a bit more, but in this case I will promptly accept the answer, just to kick up the vibe a little bit, especially since you supplied the only answer! Thank you for your good work. :-) Do you get the necromancer badge? :D
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necromancerSep 8 '13 at 22:12

@kleopatra ok, deleted. sorry but i have seen way too many instances of SO members who abuse close privileges. meta happens to be where they cluster so no point going there.
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necromancerSep 9 '13 at 8:50